LockState Connect LS-60i WiFi Internet Programmable Thermostat Has a large screen with bright white back-light and the LS-60i works with nearly any HVAC system - including traditional furnaces and heat pumps Can control up to 2 stages of heat and 2 stages of cool and able to program up to 4 independent periods per day Must have Wi-Fi router and a laptop or smartphone with Wi-Fi connectivity to provision thermostat Must have power from the furnace ("C" or "Common" wire)or or an external 24VAC transformer to power the thermostat in order to run the Wi-Fi module Available Connections: C, B, O, W, W2, Y, Y2, RH, RC, G, A; Target Temperature Range: 47F to 95F